A NATURAL JOIN in SQL automatically joins two tables based on all columns with the same name and compatible data types. It eliminates the need to manually specify the join condition, but it can lead to unexpected results if used without caution.
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Which of the following must be true for a NATURAL JOIN to work?
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Question 3 of 15
3. Question
What is the syntax of a NATURAL JOIN?
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Question 4 of 15
4. Question
What type of JOIN is NATURAL JOIN closest to?
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Question 5 of 15
5. Question
Which columns are returned when using NATURAL JOIN?
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Question 6 of 15
6. Question
Can you specify the join condition in a NATURAL JOIN?
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Question 7 of 15
7. Question
What happens if there are no matching columns in a NATURAL JOIN?
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Question 8 of 15
8. Question
Which of the following is a potential risk of using NATURAL JOIN?
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Question 9 of 15
9. Question
What does this query return?
SELECT * FROM employees NATURAL JOIN departments;
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Question 10 of 15
10. Question
What clause cannot be used with `NATURAL JOIN`?
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Question 11 of 15
11. Question
How does `NATURAL JOIN` treat NULL values in the join column?
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Question 12 of 15
12. Question
What happens when using `NATURAL JOIN` on two tables with multiple identical column names?
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Question 13 of 15
13. Question
What is the major advantage of `NATURAL JOIN`?
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Question 14 of 15
14. Question
Which is better for readability and safety: `NATURAL JOIN` or `INNER JOIN`?
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Question 15 of 15
15. Question
Which query gives more control over join conditions?
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Summary
`NATURAL JOIN` provides a concise way to join tables based on **columns with the same names**, but it can introduce risks when the table structure changes. For precise control, `INNER JOIN` with `ON` is often a safer alternative.
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